X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Finclude%2Flclient.h;h=93169c73b94128d2428cab2cf39e79e591e8c7ce;hb=22b4247fe2d724a192661a911cd295c1bb566f97;hp=8b860636bb1cb9a2189c89a3b273799852e830a4;hpb=9f463e30893138845eb571cc32426e8d1e04a9fa;p=fs%2Flustre-release.git diff --git a/lustre/include/lclient.h b/lustre/include/lclient.h index 8b86063..93169c7 100644 --- a/lustre/include/lclient.h +++ b/lustre/include/lclient.h @@ -1,6 +1,4 @@ -/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- - * vim:expandtab:shiftwidth=8:tabstop=8: - * +/* * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. @@ -26,8 +24,10 @@ * GPL HEADER END */ /* - * Copyright 2008 Sun Microsystems, Inc. All rights reserved. + * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. + * + * Copyright (c) 2011, 2012, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ @@ -43,36 +43,35 @@ #ifndef LCLIENT_H #define LCLIENT_H -int cl_glimpse_size(struct inode *inode); +blkcnt_t dirty_cnt(struct inode *inode); + +int cl_glimpse_size0(struct inode *inode, int agl); int cl_glimpse_lock(const struct lu_env *env, struct cl_io *io, - struct inode *inode, struct cl_object *clob); + struct inode *inode, struct cl_object *clob, int agl); -/** - * Common IO arguments for various VFS I/O interfaces. - */ -struct ccc_io_args { - int cia_is_sendfile; -#ifndef HAVE_FILE_WRITEV - struct kiocb *cia_iocb; -#endif - struct iovec *cia_iov; - unsigned long cia_nrsegs; - read_actor_t cia_actor; - void *cia_target; -}; +static inline int cl_glimpse_size(struct inode *inode) +{ + return cl_glimpse_size0(inode, 0); +} + +static inline int cl_agl(struct inode *inode) +{ + return cl_glimpse_size0(inode, 1); +} /** - * Locking policy for truncate. + * Locking policy for setattr. */ -enum ccc_trunc_lock_type { +enum ccc_setattr_lock_type { /** Locking is done by server */ - TRUNC_NOLOCK, + SETATTR_NOLOCK, /** Extent lock is enqueued */ - TRUNC_EXTENT, + SETATTR_EXTENT_LOCK, /** Existing local extent lock is used */ - TRUNC_MATCH + SETATTR_MATCH_LOCK }; + /** * IO state private to vvp or slp layers. */ @@ -100,14 +99,17 @@ struct ccc_io { union { struct { - int cui_locks_released; - enum ccc_trunc_lock_type cui_local_lock; - } trunc; + enum ccc_setattr_lock_type cui_local_lock; + } setattr; } u; /** * True iff io is processing glimpse right now. */ int cui_glimpse; + /** + * Layout version when this IO is initialized + */ + __u32 cui_layout_gen; /** * File descriptor against which IO is done. */ @@ -117,13 +119,18 @@ struct ccc_io { #endif }; +/** + * True, if \a io is a normal io, False for other (sendfile, splice*). + * must be impementated in arch specific code. + */ +int cl_is_normalio(const struct lu_env *env, const struct cl_io *io); + extern struct lu_context_key ccc_key; extern struct lu_context_key ccc_session_key; struct ccc_thread_info { struct cl_lock_descr cti_descr; struct cl_io cti_io; - struct cl_sync_io cti_sync_io; struct cl_attr cti_attr; }; @@ -143,6 +150,13 @@ static inline struct cl_attr *ccc_env_thread_attr(const struct lu_env *env) return attr; } +static inline struct cl_io *ccc_env_thread_io(const struct lu_env *env) +{ + struct cl_io *io = &ccc_env_info(env)->cti_io; + memset(io, 0, sizeof(*io)); + return io; +} + struct ccc_session { struct ccc_io cs_ios; }; @@ -175,7 +189,7 @@ struct ccc_object { * * \see ccc_page::cpg_pending_linkage */ - struct list_head cob_pending_list; + cfs_list_t cob_pending_list; /** * Access this counter is protected by inode->i_sem. Now that @@ -188,7 +202,19 @@ struct ccc_object { * * \see ll_vm_open(), ll_vm_close(). */ - atomic_t cob_mmap_cnt; + cfs_atomic_t cob_mmap_cnt; + + /** + * various flags + * cob_discard_page_warned + * if pages belonging to this object are discarded when a client + * is evicted, some debug info will be printed, this flag will be set + * during processing the first discarded page, then avoid flooding + * debug message for lots of discarded pages. + * + * \see ll_dirty_page_discard_warn. + */ + unsigned int cob_discard_page_warned:1; }; /** @@ -206,19 +232,9 @@ struct ccc_page { * that is, never iterated through, only checked for list_empty(), but * having a list is useful for debugging. */ - struct list_head cpg_pending_linkage; + cfs_list_t cpg_pending_linkage; /** VM page */ cfs_page_t *cpg_page; - struct cl_sync_io *cpg_sync_io; - /** - * checksum for paranoid I/O debugging enabled by - * ENABLE_LLITE_CHECKSUM configuration option. - * - * XXX This cannot be implemented reliably because checksum cannot be - * updated from ->set_page_dirty() that is called without page VM - * lock. - */ - __u32 cpg_checksum; }; static inline struct ccc_page *cl2ccc_page(const struct cl_page_slice *slice) @@ -294,9 +310,9 @@ int ccc_page_is_under_lock(const struct lu_env *env, const struct cl_page_slice *slice, struct cl_io *io); int ccc_fail(const struct lu_env *env, const struct cl_page_slice *slice); void ccc_transient_page_verify(const struct cl_page *page); -void ccc_transient_page_own(const struct lu_env *env, +int ccc_transient_page_own(const struct lu_env *env, const struct cl_page_slice *slice, - struct cl_io *io); + struct cl_io *io, int nonblock); void ccc_transient_page_assume(const struct lu_env *env, const struct cl_page_slice *slice, struct cl_io *io); @@ -340,8 +356,7 @@ void ccc_io_advance(const struct lu_env *env, const struct cl_io_slice *ios, void ccc_io_update_iov(const struct lu_env *env, struct ccc_io *cio, struct cl_io *io); int ccc_prep_size(const struct lu_env *env, struct cl_object *obj, - struct cl_io *io, loff_t start, size_t count, int vfslock, - int *exceed); + struct cl_io *io, loff_t start, size_t count, int *exceed); void ccc_req_completion(const struct lu_env *env, const struct cl_req_slice *slice, int ioret); void ccc_req_attr_set(const struct lu_env *env,const struct cl_req_slice *slice, @@ -362,17 +377,18 @@ cfs_page_t *cl2vm_page (const struct cl_page_slice *slice); struct inode *ccc_object_inode(const struct cl_object *obj); struct ccc_object *cl_inode2ccc (struct inode *inode); -int cl_setattr_do_truncate(struct inode *inode, loff_t size, - struct obd_capa *capa); -int cl_setattr_ost(struct inode *inode, struct obd_capa *capa); +int cl_setattr_ost(struct inode *inode, const struct iattr *attr, + struct obd_capa *capa); struct cl_page *ccc_vmpage_page_transient(cfs_page_t *vmpage); int ccc_object_invariant(const struct cl_object *obj); -int cl_inode_init(struct inode *inode, struct lustre_md *md); +int cl_file_inode_init(struct inode *inode, struct lustre_md *md); void cl_inode_fini(struct inode *inode); int cl_local_size(struct inode *inode); __u16 ll_dirent_type_get(struct lu_dirent *ent); +__u64 cl_fid_build_ino(const struct lu_fid *fid, int api32); +__u32 cl_fid_build_gen(const struct lu_fid *fid); #ifdef INVARIANT_CHECK # define CLOBINVRNT(env, clob, expr) \ @@ -390,10 +406,11 @@ __u16 ll_dirent_type_get(struct lu_dirent *ent); int cl_init_ea_size(struct obd_export *md_exp, struct obd_export *dt_exp); int cl_ocd_update(struct obd_device *host, struct obd_device *watched, - enum obd_notify_event ev, void *owner); + enum obd_notify_event ev, void *owner, void *data); struct ccc_grouplock { struct lu_env *cg_env; + struct cl_io *cg_io; struct cl_lock *cg_lock; unsigned long cg_gid; }; @@ -402,4 +419,31 @@ int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock, struct ccc_grouplock *cg); void cl_put_grouplock(struct ccc_grouplock *cg); +/** + * New interfaces to get and put lov_stripe_md from lov layer. This violates + * layering because lov_stripe_md is supposed to be a private data in lov. + * + * NB: If you find you have to use these interfaces for your new code, please + * think about it again. These interfaces may be removed in the future for + * better layering. */ +struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj); +void lov_lsm_put(struct cl_object *clobj, struct lov_stripe_md *lsm); +int lov_read_and_clear_async_rc(struct cl_object *clob); + +struct lov_stripe_md *ccc_inode_lsm_get(struct inode *inode); +void ccc_inode_lsm_put(struct inode *inode, struct lov_stripe_md *lsm); + +/** + * Data structure managing a client's cached clean pages. An LRU of + * pages is maintained, along with other statistics. + */ +struct cl_client_cache { + cfs_atomic_t ccc_users; /* # of users (OSCs) of this data */ + cfs_list_t ccc_lru; /* LRU list of cached clean pages */ + spinlock_t ccc_lru_lock; /* lock for list */ + cfs_atomic_t ccc_lru_left; /* # of LRU entries available */ + unsigned long ccc_lru_max; /* Max # of LRU entries possible */ + unsigned int ccc_lru_shrinkers; /* # of threads reclaiming */ +}; + #endif /*LCLIENT_H */